Scroller jig saw

A scroller jig saw, comprising:

• a housing;
• a saw blade drive shaft mounted for reciprocating movement relative to said housing along a longitudinal axis and for rotation about said axis;
• a motor mounted in said housing and drivingly connected to said drive shaft for reciprocating said drive shaft along said axis;
• a scrolling control member accessible to an operator and coupled to said drive shaft for rotation thereof;
• locking means for releasably locking said drive shaft against rotation;
• said locking means comprising a pivotally mounted lever pivotal between a locking position in which said drive shaft is locked against rotation and a free position in which said drive shaft is free to rotate;
• said lever being resiliently biased towards said locking position;
• a locking control member accessible to the operator and movable between a scrolling position, in which said locking control member acts upon said lever to hold the latter in said free position, and a non-scrolling position in which said control member allows said lever to be biased into said locking position;
• a scrolling control assembly which includes and is rotatable by said scrolling control member, and further includes a part in which said drive shaft is mounted for reciprocation relative thereto but for rotation therewith;
• and
• said drive shaft having a circular cross-section and said part having a bore therein of a non-circular crosssection, said drive shaft being mounted for reciprocation in said bore but having at least one lateral projection which cooperates with said non-circular bore to prevent relative rotation between said drive shaft and said part.

A scroller jig saw, comprising:

• a housing;
• a saw blade drive shaft mounted for reciprocating movement relative to said housing along a longitudinal axis and for rotation about said axis;
• a motor mounted in said housing and drivingly connected to said drive shaft for reciprocating said drive shaft along said axis;
• a scrolling control member accessible to an operator and coupled to said drive shaft for rotation thereof;
• locking means for releasably locking said drive shaft against rotation;
• said locking means comprising a pivotally mounted lever pivotal between a locking position in which said drive shaft is locked against rotation and a free position in which said drive shaft is free to rotate;
• said lever being resiliently biased towards said locking position;
• a locking control member accessible to the operator and movable between a scrolling position, in which said locking control member acts upon said lever to hold the latter in said free position, and a non-scrolling position in which said control member allows said lever to be biased into said locking position;
• and
• said lever being pivotally mounted intermediate its ends, being resiliently biased by a compression spring acting on one of said ends, and being engageable by said locking control member at the other of said ends.

A jig saw, comprising:

• a housing having a top and two sides;
• a saw blade drive shaft of circular cross-section mounted in spaced apart bearings in said housing for reciprocating movement along a longitudinal axis of said drive shaft and for rotation about said axis;
• a flanged block having a bore therethrough of non-circular cross-section, said block drive shaft engaging in said bore for reciprocating movement therein;
• a pin extending transversely through said drive shaft cooperating with said bore to prevent rotation of said drive shaft therein;
• a manually operable member rotatably mounted through the top of said housing and connected to said block for manual rotation thereof;
• a lever pivotally mounted in said housing adjacent said block, an end of said lever being spring biased to engage said flange to lock said block and said drive shaft against rotation;
• a ring-like member having a cam surface on one side thereof and being rotatably mounted on said manually operable member at a location inside said housing;
• said ring-like member being rotatable between a first position, in which cam surface engages said lever and pivots the lever out of engagement with said flange to enable said block and said drive shaft to be rotated, and a second position in which said cam surface allows said lever to be spring biased into engagement with said flange for locking said block and said drive shaft against rotation;
• and
• said ring-like member having diametrically opposed protrusions extending outwardly through openings in the two sides of the housing adjacent the top of said housing, said protrusions being manually accessible for rotation of said ring-like member between said first and second positions.